At what freq. does sound become non-directional?

I've heard bass is non-directional below 60 Hz, 100 Hz, 160Hz. Don't believe it. There is no bass like stereo bass. Period.

It's not the directionality of the soundwave (which will vary with dimensions of walls, baffles, distances to boundaries, etc. ad nauseum!), but the issues re proper bass-loading in your room. Best results are usually obtained with multiple woofer locations, so that you have some chance of balancing and averaging out room nodes.
The human ear, however, has trouble discerning direction below 100-150Hz, right? OTOH there may be enough harmonic overtones and/or distortion artifacts, or even noise contributants that are indeed very discernable due to their higher frequencies. It's not that low bass is or isn't directional, it's that you can't perceive it as such without
higher frequency cues.

You really will have to use your ears alot on this one. THX standard is 80hz and most crossovers range from 40hz to low 100hz+. If your room is 70feet wide, you'll hear stereo bass at any frequency, since the length of even deepest soundwaves is less than all the boundaries. You'll have to compensate for the room gain and watch the overlap throughout the crossover region to get as smooth a response possible

I definitely agree with the first reply it's definitely directional you can hear where the bass is coming from.

I can turn off my main amps and sit there listening to my two Entec woofers imaging all over the place below the 100hz crossover.....Other than moogs and organs not much information below 50hz I want to listen to, but it adds space to the presentation and surprising how much venue information is extremely low frequency as size of the stage grows about 25% when woofers are switched in over the main speakers running full range (Rockport Syzygys which are good into the thirties).....